| Project/Area Number |
24780232
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 多孔質媒体 / 水理特性 / 疎水性粒子 / 間隙ネットワーク / パーコレーション / 撥水性土壌 / ぬれ性 / 透水係数 / 水分保持特性 / 間隙ネットワークモデル / 接触角 |
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| Outline of Final Research Achievements |
It is well known that soil’s hydraulic properties, which are very important factors for growing plants, are drastically changed when hydrophobic grains are mixed into the media. To utilize this effect appropriately for agricultural purposes such as soil improvement and prevention of salt accumulation, we need to know its mechanisms in a pore scale. So, we conducted laboratory experiments and developed models expressing pore-scale phenomena. Percolation theory was applied to the pore network, which represents actual pore structures and connectivity with pore bodies connected by pore throats, and it revealed that critical percolation probability, which is one of network properties, was changed significantly by hydrophobic grains, and it is considered this leads to the drastic change of the soil properties.
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